It looks like Nutch 2 wants some kind of database already installed, but there's no mention of that in the (sparse) documentation that I can see.

The production environment will eventually be a linux/Hadoop cluster, but for the moment I'm just trying to get a simple local system to work out of the box.

So what options are there for a simple Nutch database? How do you tell Nutch and Gora about the database? HBase might be a good answer as soon as we have our Hadoop cluster up and running. However; in the meantime is there a simple, even slow, database that will work for initial exploration on a single system?